Simultaneous and Rapid Analysis of Multi-pesticide Residues using On-line SPE-LC-Orbitrap Mass Spectrometry

Abstract

In this study, we developed a rapid and simple analytical method for the simultaneous determination of pesticide residue in environmental water using an LC-Orbitrap (Q-Exactive Plus) with electrospray ionization mode. The detection process was performed in Full scan/ddMS2 mode. Sample preparation was performed using online SPE. Only 1 mL of each water sample was injected during the on-line SPE and the samples were concentrated in a Hypersil GOLD aQ trapping column. We compared seven gradient programs and three analytical columns to analyze the 360 pesticides. Most compounds were detected using the CORTECS C18 column with the 7 th gradient program method. The established method was validated by linearities, accuracy, precisions, and limits of quantification (LOQ) of the 340 pesticides. The calibration linearities were over 0.994 and LOQ were 5.2-283.3 ng/L. Accuracy and precision values were achieved in the ranges of 91-120% and 0.63-8.21%, respectively. This method can be applied to effectively monitor the health of aquatic environments and can be potentially applicable in a variety of fields in the future.

Revealing the Extent of Pesticide Runoff to the Surface Water in Agricultural Watersheds

“…The sample preparation and LC-ESI-Orbitrap-MS analysis were modified from Jeon et al [33] as follows. The collected samples were filtered onsite using a 0.2-µm pore size filter.…”